/Engine/Plugins/Experimental/GeometryScripting/Source/GeometryScriptingCore/Public/GeometryScript/ShapeFunctions.h
Get the Vector for the direction of the X/Y/Z axis of the Transform, ie the Vector resulting from transforming the unit direction vectors (1,0,0) / etc
static FVector GetTransformAxisVector ( FTransform Transform, [EGeometryScriptAxis](API\Plugins\GeometryScriptingCore\GeometryScript\EGeometryScriptAxis) Axis )